Morse, W. S. (1926). Catalogue of pictures by Howard Pyle, in the permanent collection of the Wilmington Society of the Fine Arts, Public library building, Wilmington, Delaware. [Wilmington, DE.

Morse, Willard S. Catalogue of Pictures By Howard Pyle, in the Permanent Collection of the Wilmington Society of the Fine Arts, Public Library Building, Wilmington, Delaware. [Wilmington, DE, 1926.

Morse, Willard S. Catalogue of Pictures By Howard Pyle, in the Permanent Collection of the Wilmington Society of the Fine Arts, Public Library Building, Wilmington, Delaware. [Wilmington, DE, 1926.